feat: add used_percent for cgroups

[gaius-qi]

Description

This pull request introduces new fields to track resource usage percentages in cgroup-related data structures and updates the validation logic accordingly. The main focus is on adding a used_percent field to both CPU and memory cgroup types across protobuf definitions, generated code, and Rust structures.

Enhancements to cgroup resource tracking:

• Added the used_percent field to the CgroupCPU and CgroupMemory messages in pkg/apis/common/v2/common.proto and proto/common.proto to represent the percentage of CPU and memory used by a cgroup. [1] [2] [3] [4]
• Updated the corresponding Rust structs CgroupCpu and CgroupMemory in src/common.v2.rs to include the new used_percent field. [1] [2]

Validation logic updates:

• Modified the generated validation code in pkg/apis/common/v2/common.pb.validate.go to acknowledge that there are no validation rules for the new UsedPercent fields in both CPU and memory cgroup types. [1] [2]

Version bump:

• Incremented the package version in Cargo.toml from 2.2.17 to 2.2.18 to reflect the new changes.

Related Issue

Motivation and Context

[chlins]

lgtm